Stair tread



FIG. 1 is a front perspective view of my stair tread;

FIG. 2 is a front view;

FIG. 3 is a rear view;

FIG. 4 is a left side view;

FIG. 5 is a right side view;

FIG. 6 is an enlarged view of the encircled portion of FIG. 4;

FIG. 7 is a top view;

FIG. 8 is a bottom view;

FIG. 9 is a front perspective view of a second version of my stairtread;

FIG. 10 is a front view;

FIG. 11 is a rear view;

FIG. 12 is a left side view;

FIG. 13 is a right side view;

FIG. 14 is an enlarged view of the encircled portion of FIG. 12;

FIG. 15 is a top view; and,

FIG. 16 is a bottom view.

CLAIM The ornamental design for a stair tread, as shown and described.